Both headgears are leveling items (right-click on them to upgrade them), Watchman's between QL 140 and 180, Chief's between QL 180 and 200. Both are also title locked, Watchman's at title 4 to 5 and Chief's at title 5. So when upgrading your Ceremonial Watchman's Hood, one needs to be careful at QL 159, if still title 4 (you can upgrade your hood past your title, if you only meet the Agility and Sense requirement but you won't be able to wear it).